Screen goes blank when playing games at fullscreen

[adamvk]

My setup is my Macbook Pro attached to my Dell U2410 monitor via a MiniDisplay Port to DVI cable. Lately I'm having an odd phenomenon. When I go into full screen or play any full screen games, it will randomly loss signal on the monitor for a few seconds, and then come back. The actual Mac display stays on. When I'm not playing full screen games, the monitor is completely fine, it never does it. I've tested it with 4 different games though and they all do the same thing. I've also hooked my Xbox 360 up to it via HDMI for kicks and it works just fine. Any ideas?

 

[adamvk]

Also I just changed from using HDMI to using DVI when the problem started. Don't know if that would affect it though.